A zwl file extension is related to the WinLabel version 3. A zwl file stores label document.
ZWL file extension - WinLabel label data
What is zwl file? How to open zwl files?
File type specification:
The zwl file extension is associated with the WinLabel labels creator for Microsoft Windows.
The zwl file stores label document created in the WinLabel version 3.
WinLabel is obsolete product replaced by other apps developed by Avery.
This zwl file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.